JS

JavaScript Formatter

Format and beautify JavaScript code with proper indentation.

JavaScript formatterJS beautifierJavaScript pretty printformat JS
Indent:
2 functions2 variables
Input JavaScript273 chars
Formatted JavaScript324 chars
function greet(name) {
  const message="Hello, "+name+"!";
  console.log(message);
  return message;
}
const users=["Alice","Bob","Charlie"];
users.forEach(user => greet(user));
class Person {
  constructor(name,age) {
    this.name = name;
    this.age = age;
  }
  sayHello() {
    console.log("Hi, I'm "+this.name);
  }
}

What is JavaScript Formatter?

JavaScript Formatter beautifies and formats JavaScript code with proper indentation and line breaks. It transforms minified or poorly formatted JavaScript into readable, well-structured code following best practices.

Common Use Cases

Debugging

Format minified JS from browser sources for debugging.

Code Review

Clean up code before review or sharing.

Learning

Understand JS libraries by formatting their source code.

Refactoring

Format code as a first step in refactoring.

How to Use This Tool

  1. Paste your JavaScript code
  2. Click "Format" to beautify
  3. Configure indentation (2 or 4 spaces)
  4. Copy the formatted code

Frequently Asked Questions

Does this support TypeScript?
Basic TypeScript formatting works, though some TS-specific syntax may vary.
Will formatting change my code behavior?
No, the formatter only changes whitespace and doesn't modify logic.
Can it fix syntax errors?
No, the code must be syntactically valid before formatting.

JavaScript Formatter is a free online tool that requires no signup or installation. It works directly in your browser, keeping your data private and secure.